Grohe Mixing Valve for a Talia Shower fixture adjustment.
We installed a Grohe mixing valve and on/off valve for our Talia fixture in 2008. Recently we cannot adjust the water cool enough when lever is turned all the way to cold. It's barley tolerable. We certainly cannot set the temperature in the middle. The water would be "scalding" hot.
Is there a way to adjust the temperature.
I am a plumbing novice and have never done this before. Someone told me it could be the temperature stops another said the cartridge.
What do you think?